Valve-gear.



H. LENTZ & C'. BBLLENS.- .VALVE GEAR. APPLIGATION FILED JUNE zz, 1907.

921 ,418, Patented May 11, 1909.

MJ-m; N www@ itlthll STrtllt ormone VHUG@ LENTZ, GF ,HALE-NSEM NEARBERLN, GERMANY, AND CHARLES lzvllilillFlS, QF NEULLY, FRANCE.

vALvE-GEAR.

ne, 921,41s.

Specification of Letters Patent.

Patented may 11, 1909.

Application filed .Tune 22, 1907. Serial No. 380,278,

To all whom 'it 'muy concern:

Be it known that we, Huso LnNr-z, a subject of the Emperor of Germany,and resident of 123 Kurfrstendamm, at Halensee, near Berlin, Germany,engineer', and CHARLES BELLENS, a subject of the King of England, andresident of 43 Rue de Chzy, at Neuilly Seine, France, engineer, haveinvented certainnevv and. useful Improvements in Valveperating Gears, ofwhich the following is a specification.

This invention relates to valve mechanism for steam engines in which thevalves are operated by a cam shaft, and it is characterized particularlyby lthe fact that the cam shaft is located in a fixed casing, formedwith sockets having an external diameter e ual to or slightly greaterthan the largest diameter of the cams to allow of the passage of thesame, to the end that by fitting and introducing the cani shaft into atubular sleeve or envelop it is rendered oil, steam and dust tight,without the assistance of stuiiing boxes or similar devices.

A constructional form of the object of the invention isillustrated byWay of eX- aniple in the accompanying drawing.

The cam shaft .fi provided at one of its entremities uib an operatingmember b, such li. wheel r toothed envelop er casing ,f auf, y, .f theSame and .ted with. a tight sleeve 7L in the v lve eceived by the casinglength except Where This casing has an q that of the largest diameter oAthe in order that he shaft, the cams and the casing may be introducedinto the sleeve it. For facilitating mounting, the socket f comprisedbetween the cams o and d is preferably made in two parts equal to orpreferably' tseparated by a. diametral plane, and when 45 the cams areformed integral with the camshaft this is absolutely necessary. The camshaft 0 may comprise grooves i for the lubricant.

This arrangementpresents the advantage of being perfectly steam and oiltight Without the employment of stuiling boxes or similar devices, andmoreover protects the operating members from dust owing to the largebearing surfaces situated both between the 5 shaft and its casing andbetween the latter and its sleeve. Another advantage consists in thesimplicity of the construction and the ease with which the valve gearmay be assembled.

It will, of course, be understood that the number of sockets on thecasing will vary in accordance with the number of cams on the cam shaft,that is to say, according to the type of machine to which the inventionis applied. A

The casing may be held in position by any suitable means, such asscrews, keys or other parts, and it may be other than circular in crosssection. The sockets are not necessarily of the saine diameter and thecam shaft may, .of course, be operated by any a propriate operatingmeans, such as a plate, ever, crank or the like.

Having novv particularly described and ascertained the nature of our.said invention and in what manner the same is to be performed, Wedeclare that what we claim is l. In a valve operating gear, a shaftprovided with a plurality of cams, operating means for the shaft, atubular casing whose interior diameter is slightly larger than thelargest diameter of the cams, and sockets surroundinrr the shaft andfitted tightly in said tubular casing.

2. ln a valve operating gear, a shaft provided vvith a plurality ofcams, operating means for the shaft, a tubular casing, and

Y Grooves for the lubricant, operating means A placed our hands atBerlin this 1st clay of ltween two cams sockets surroundingJr the shaft(Fund ttecl June 1907, and at Paris, this 8th day of tightly in saidtubular casing, the socket be- June`19-07. A

being made in tw'o parts HUGQ LENTZ.

which are se arable in an axial plane.

3. In a, va ve operating gear, a shaftpro- 0 i t YVitnesses as to thesignature of Hugo vlded with a plurahty ol: cams and with Leutz:

VVOLDEMAR HAUPT,

HENRY HASPER.

Witnesses as to the signature DEAN B. MASON,

. HENRY SCHWAB.

or the shaft, a tubular casing, and sockets surrounding the shaft andfitted tightly in said tubular casina.

In testimony whereof We have hereunto CHARLES BELLENS.

of Charles

